bounds can be -1 for not-found
bounds can be -1 for not-found

Change-Id: I941ef1dae00167460f2f0de39e472ed047539f27

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core